Routine Maintenance and Restoration Program

The Routine Maintenance and Restoration Program, managed by the East Bay Regional Park District and approved by the Central Valley Regional Water Quality Control Board, involves critical infrastructure repairs and environmental restoration in Contra Costa County. A primary focus is the BD_UC_701 Culvert Replacement Project at Black Diamond Mines Regional Preserve, where a culvert on the Stewartville Trail crossing Sand Creek was dislodged during 2023 storms. The scope of work includes replacing the damaged structure with a 60-inch diameter by 30-foot long CMP culvert, installing new headwall and tail-wall rock slope protection, and adding energy dissipators. To mitigate downstream incision, the project also incorporates low-tech restoration activities such as installing willow fascines and planting native vegetation. Additionally, the program includes the CL_RST_701 Pond Restoration Project at Contra Loma Regional Park. This effort focuses on repairing a failed stock pond embankment, constructing a new rock-lined spillway, and removing sediment to improve the habitat for the California tiger salamander. Both projects have been determined to have no significant environmental effect, with the pond restoration supported by a Negative Declaration under CEQA. The program is categorized under NAICS code 237990 and is coordinated through the East Bay Regional Park District and the Central Valley Regional Water Quality Control Board.